[kiloran]

I've been searching for one for 18 months via eBay etc and only one has come up, which went for £85. Retrofitting a different valve like the MK1 Golf valve is your only option if you want controllable heat, which you probably do, even if we're now in winter. You could just plumb in a manual tap but that's probably not ideal. And a scrap valve is likely to suffer the same issues as the original - the inlet and outlet pipe are plastic and easily deformed and prone to cracking